Optical control of the magnetic anisotropy of ferromagnetic bilayered manganites.

نویسندگان

  • S Tomimoto
  • M Matsubara
  • T Ogasawara
  • H Okamoto
  • T Kimura
  • Y Tokura
چکیده

Optical manipulation of the magnetic anisotropy is demonstrated for bilayered manganites, La2-2xSr1+2xMn2O7, by means of femtosecond Kerr-rotation measurements. Upon the photoexcitation on the x=0.32 crystal, the magnetization exhibits the precessional motion for about 1 ns, revealing the directional change of the magnetocrystalline anisotropy from the c axis to the ab plane. This change of the anisotropy induces the nonthermal decrease of the c-axis magnetization component for about 1 ns.

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عنوان ژورنال:
  • Physical review letters

دوره 98 1  شماره 

صفحات  -

تاریخ انتشار 2007